6 replies to this topic

[Nothy]

This is one hell of a strange error I've been dealing with lately, I think it might be because shell.run() only can return true or false, though.
Any help would be appreciated! Thanks

Spoiler

	if button == 2 and event == "mouse_click" then

	  for i=1, #f_file do
		if x > 7 and x <= 20 and y == 6+i then
		  --print(tostring(fs.isDir(files..f_file[i]))..":"..files..f_file[i])
		  --print(files)
		  --print(f_file[i])
		  if fs.isDir(files..f_file[i]) then

		  else
			if files..f_file[i] == "startup" then
			  error("An instance of Axiom is already running")
			else
			  if not fs.exists(files..f_file[i]) then
				error("File not found")
			  else
				local ok, val = pcall(shell.run(files..f_file[i])) --# error: sys-latest.axs:1435: attempt to call boolean
				if val then
				  errorMessager(val)
				end
			  end
			  filebrowser()
			end
		  end
		end
	  end
	end

Edited by Nothy, 24 May 2016 - 07:02 PM.

[Dragon53535]

You're using pcall wrong, you need to pass it a function pointer.

pcall(shell.run,files..f_fille[i])

First argument is function that is going to be run, others are arguments to pass to the function.

What you were doing was running shell.run FIRST, and then when that ended it tried to run pcall on the boolean returned by shell.run, which of course doesn't work.

Edited by Dragon53535, 24 May 2016 - 07:05 PM.

[Nothy]

Dragon53535, on 24 May 2016 - 07:05 PM, said:

You're using pcall wrong, you need to pass it a function pointer.

pcall(shell.run,files..f_fille[i])

First argument is function that is going to be run, others are arguments to pass to the function.

What you were doing was running shell.run FIRST, and then when that ended it tried to run pcall on the boolean returned by shell.run, which of course doesn't work.

That explains a lot, thank you!

One issue though, now I won't get the error that is deliberately thrown in the file I'm trying to run.
Should I use xpcall instead?

[Dragon53535]

What file are you trying to run?

[Nothy]

a file that just simply throws an error, then it's done. it's located in os/user_files_/User-programs/crash.
It's a single line of code.

 error("test")

[Dragon53535]

The problem is that shell.run calls os.run that then uses pcall. You'd have to then create your own run function, in which the program being run has the proper environment. I don't know exactly what environment table you'd need to give, so someone else will have to help with that.

[Nothy]

Right, okay.
I'll see what I can do.